Phoenix Suns forward Tom Gugliotta was released from a Portland, Ore., hospital today and was returning to Arizona for further tests to try to determined what caused his seizure on a team bus Friday night.

Gugliotta underwent a series of tests at Legacy Emanuel Hospital in Portland and none showed any reason for the incident, which occurred about 45 minutes after the Suns beat the Portland Trail Blazers.

"All of the tests that he's had, which are the typical, routine tests you have for someone who's had a seizure--the CAT scans, the EKGs, the lab work--everything is completely normal at this time," Suns team physician Richard Emerson said during a news conference tonight. "So the good news is that Tom is feeling very good, although somewhat fatigued.

"What we can't tell you is what caused it. Sometimes you never know what causes these things."

Gugliotta was flying home with his wife, Nikki, and assistant trainer Aaron Nelson tonight. Emerson said he planned to examine Gugliotta at the player's home later tonight, with further tests planned in the coming days.

"Barring anything else that may happen, we assume he's going to be ready to play as soon as we can get him checked out after he's here," Emerson said.

Suns owner Jerry Colangelo said he spoke with Gugliotta by telephone this morning.

"He woke up at four this morning and didn't know where he was," Colangelo said. "They had a tube in his trachea so that he would breathe, and I guess that's a little scary to wake up and find yourself in a hospital bed. Then he went back to sleep. When I spoke to him he had just awakened and he was very relieved, and he sounded very coherent to me."

Gugliotta does not have a history of seizures or any other health problems. He had started all 22 games for the Suns this season and was second on the team in minutes played.